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Alarm System Sensors
Alarm systems can receive information from a wide variety of sensors, including:
- Infra-red human motion detectors (sometimes called ‘PIRs’)
- Door and window contact sensors
- Smoke detectors
- Gas detectors (e.g. carbon dioxide/monoxide)
- Glassbreak detectors (acoustic)
- Flood detectors
Other more specialist sensors (e.g. temperature, pressure) can also be used if there is a particular need. There are also some sensors that use dual or triple technology mechanisms (infrared, ultrasonic and acoustic) to determine with a high level of accuracy if a room is occupied.
Sensors are the ‘eyes and ears’ of an alarm system and it is important that they work correctly. A quality alarm system will provide notification messages and/or emails in the event of a problem with any of the sensors. If the system has a station monitoring link, the monitoring station will also inform the designated ‘key-holder’ if there is a problem with a sensor.
